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arXiv 1111.1867hep-ph
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由4个重夸克组成的四夸克

Tetraquarks composed of 4 heavy quarks

A. V. Berezhnoy, A. V. Luchinsky, A. A. Novoselov

备注：
8 pages, 3 figures, in the revised version several refences were added
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摘要：

在目前的工作中，光谱学和在大型强子对撞机上观察由4个重夸克组成的四夸克的可能性进行了讨论。有关的四夸克态是T_{4c} =[cc][cc]$，T_{4b} =[bb][bb]和T_{2[bc]} =[bc][bc]。通过求解非相对论薛定谔方程，得到了这些态的质量，并考虑了超精细分裂。结果表明，张量四夸克T_{4c}（2++）和T_{2[bc]}（2++）的质量足够高，可以在pp -> T_{4c} +X -> 2 J/J +X中观察到这些态作为重夸克偶不变质量分布的峰，pp -> T_{2[bc]} +X -> 2 B_{c} +X和pp -> T_{2[bc]} +X -> J/T_{4b}（1 S）+X通道，而T_{4b}在衰减为矢量底质子对的阈值之下。

英文摘要：

In the current work spectroscopy and possibility of observation at the LHC of tetraquarks composed of 4 heavy quarks is discussed. Tetraquarks concerned are T_{4c}=[cc][cc]$, T_{4b}=[bb][bb] and T_{2[bc]}=[bc][bc]. By solving nonrelativistic Schroedinger equation masses of these states are found with the hyperfine splitting accounted for. It is shown that masses of tensor tetraquarks T_{4c}(2++) and T_{2[bc]}(2++) are high enough to observe these states as peaks in the invariant mass distributions of heavy quarkonia pairs in pp -> T_{4c}+X -> 2J/ψ+X, pp -> T_{2[bc]}+X -> 2B_{c}+X and pp -> T_{2[bc]}+X -> J/ψΥ(1S)+X channels while T_{4b} is under the threshold of decay into a vector bottomonia pair.

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